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Loans and allowance for credit losses - Impaired Loans Segregated by Class (Details) $ in Thousands | Dec. 31, 2019 USD ($)
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Recorded investment |
With a related allowance recorded | $ 14,126
With no related allowance recorded | 9,684
Total impaired loans | 23,810
Unpaid principal |
With a related allowance recorded | 16,881
With no related allowance recorded | 11,759
Total impaired loans | 28,640
Related allowance | 895
Commercial and industrial |
Recorded investment |
With a related allowance recorded | 6,080
With no related allowance recorded | 2,946
Unpaid principal |
With a related allowance recorded | 8,350
With no related allowance recorded | 3,074
Related allowance | 241
Construction |
Recorded investment |
With no related allowance recorded | 2,061
Unpaid principal |
With no related allowance recorded | 2,499
Residential real estate | 1-to-4 family mortgage |
Recorded investment |
With a related allowance recorded | 264
With no related allowance recorded | 1,083
Unpaid principal |
With a related allowance recorded | 324
With no related allowance recorded | 1,449
Related allowance | 8
Residential real estate | Residential line of credit |
Recorded investment |
With a related allowance recorded | 320
With no related allowance recorded | 259
Unpaid principal |
With a related allowance recorded | 320
With no related allowance recorded | 280
Related allowance | 9
Commercial real estate | Owner occupied |
Recorded investment |
With a related allowance recorded | 756
With no related allowance recorded | 2,237
Unpaid principal |
With a related allowance recorded | 1,140
With no related allowance recorded | 2,627
Related allowance | 238
Commercial real estate | Non-owner occupied |
Recorded investment |
With a related allowance recorded | 6,706
With no related allowance recorded | 1,049
Unpaid principal |
With a related allowance recorded | 6,747
With no related allowance recorded | 1,781
Related allowance | 399
Consumer and other |
Recorded investment |
With no related allowance recorded | 49
Unpaid principal |
With no related allowance recorded | $ 49

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- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953550-111524 + Details
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